PHYS-224 Dr. Russell (Summer 2008) Test #1 (chapters 26, 27, 28) Page 1
Name: (please print) _______________________________________
Class Meeting Time: 8:00am 11:25am 2:25pm
1. You must sho w ALL work in a clear and o rganized manner in order to receive full credit. Insufficient
work or incomplete explanations will result in a loss of points.
2. Cheating will be dealt with severely. Keep your eyes on your own pap er, and do not attempt to talk or
communicate to any student around you. Students who are involved in any kind of cheating will
receive a ZERO on this test, and will be referred to the Dean of Students for disciplinary action.
3. Except for a simple numerical mistake in adding points, any appeals regarding how this exam was
graded must be submitted in writing (return the exam al so) within 3 class meetings after the test was
handed back.
Test #1 Raw Score: ____ / 60 Test #1 Grade: _____ / 100
1. (10 pts) In the figure below, the infinite plane has a charge density of
η
= +35.2×10–9 C/m2, the infinite
line has a charge density of
λ
= –8.2 ×10–9 C /m and the point charge has Q = –0.72×10–9 C. What is
the net electric fi eld (magnitude and direction) at point P?
